I get this crash when trying to start the game with the mod installed.
http://pastebin.com/YJHW1iKK

Yes it works just fine now. Just tried it on my vanilla server with structure data copied to the client, and some known structures were showing up nicely. Thank you! :)

This was related to the java version used at compile time and a weird bug with covariance differences between java 7 and 8. I've uploaded a fresh version with a fix for this. Please confirm it works okay for you.

Sorry I should let you close the issue if you are happy it works for you